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Bestimmung der Nettorhizodeposition von Winterweizen mit Hilfe eines respirometrischen Verfahrens
Author(s) -
Knof G.
Publication year - 1991
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1991.tb00965.x
Subject(s) - agronomy , fertilizer , nitrogen fertilizer , nitrogen , environmental science , decomposition , chemistry , mathematics , biology , organic chemistry
Determination of net rhizodeposition of winter wheat by means of a respirometrical technique Net rhizodeposition (root carbon, which is deposited into soil at a chosen harvesting term) may be estimated respirometrically by a laboratory experiment with a root contained soil probe, if microbial decomposition of it is compared to microbial decomposition of a standard root probe of the same origin. Net rhizodeposition therefore is given byThis technique was applied to three treatments of a N fertilizer trial with winter wheat. Calculated net rhizodeposition was compared to above ground crop. On an average it amounted to 20 per cent of shoot carbon. Mass and nitrogen content of it increased with increasing quantity of N fertilizer.